Window-blind



UNITED STATES PATENT OFFICE.

CHARLES W. SMITH, OE EVANS, NEIN YORK.

WIND OW-BLIN D.

Specification of Letters Patent No. 28,908, dated June 26, 1860.

To all whom it may concern:

Be it known that I, CHARLES W. SMITH, of the town of Evans, county of Erie and State of New York, have invented a new Mode of Constructing and Operating Blinds for Windows; and I do hereby declare that the following is a full description thereof, reference being made to the drawings accompanying this specification and making a part of the same and to the letters of reference marked thereon.

My invention relates to a new mode of constructing and operating blinds for windows and consists, first, in attaching the slats of such blinds at each end to a series of jack levers by means of which they are folded together at the top of the window or eX- tended downward closing the same; second, in weighting the said levers to facilitate the operation of raising them; third, in so attaching the slats to said levers that they will be thrown open when the levers are but slightly raised.

To enable others skilled in the art to make and use my invention I will proceed to describe it fully.

I construct the slats of my blinds of either wood or iron, making them much wider than usual. I then construct two pairs of jack levers and attach the upper edge of the blind slats a, a, to their rear pivots b, b.

'Ihe front pivots b', b', may be made long enough to project under and catch the blinds, or additional projections c, c, may be provided for this purpose.

To the upper end of the series of levers is attached a lever e, bearing a weight f. The gravity of this tends to counterpoise the weight of the blinds and to facilitate their elevation.

Two cords g, g, Figure l, wind around the pulleys h, i, 7c, and may be attached to any of the levers. Then therefore 7L, is turned by a knob or crank upon its aXis Z, the blinds will evidently be operated. Before it can be turned, however, it must be pulled inward far enough to free the knob or crank from the notches in the rose behind it, as seen clearly at Fig. 4, it being a suiiicient motion.

Having now described my invention, what I claim as new therein, and desire to secure by Letters Patent, is-

y l. The described method of operating the blind slats n, a, by means of ack levers.

2. The described method of attaching them to the levers.

3. Veighting said levers to assist in elevating the blinds.

CHAS. W. SMITH.

Witnesses EDM. F. BROWN, JOHN SHAW. 

